1. A mental belief that something is true: The new evidence gives some credence to the theory proposed by the professor.

Credence is close in meaning to belief; however, it is seldom applied in connection with faith in a religion or philosophy and it is more often used with reference to reports, rumors, and opinions.

2. Acceptance based on the degree to which something is believable: Claims that a political candidate can become the nest President of the U.S. gain credence only after he or she has won enough primaries.